Watee detectors por steam-genebatobs



atten .gisten strat @Hire WILLIAM W.` BAILEY, or NEW YORK, N. Y.

Letters .Patent No. 75,618, dated March 17, 1868.

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3ro ALL' WHoM IT MAY ooNonRN:

Be it known ,that I, WILLIAM W. BAILEY, vof the city andStat-e of New York, have invented and made a certain new and useful Improvement in Low-Water Indicators for Steam-Boilers; and I do hereby declare the following to be a full, clear, and exact description of the said invention, reference being made to the annexedJ drawing, making part of 'this specification, wherein- Figure lis an elevation of the said indicator with the cover removed. Ii'ignre 2 is a vertical section at the line :v `se; and Figure 3 is a plan of; `said indicator. Similar marks of reference denote the same parts. This invention consists in a metallic tube, placed near the level of the low-water line, in combination with a tension-valve opener, formed with a bend or angle near its centre, in order that the expansion of the said tpbe, as it lls with-stcam, shall by said tension-valve opener communicate an increased motion to the valve which gives the alarm. 'By this construction the complicated and costly apparatus heretofore employed to open valve by a compression ,endwise of a spring is dispensed withand the risk of the parts becoming inoperative .is avoided. also enclose the lowfwater indicator in a case with a movable cover, to be lockedA or sealed up, soV as to entirely prevent th apparatus being rendered inoperative, either accidentally or by design, thus preventing the risks that exist with other low-water indicators that they will be tampered with t'o evade .the legal enactments andreglilations concerning steam-boilers.

i ,In the drawing, a is a pipe leading from the steam-space of a boiler to any desired position where the indicator is to ble placed, andb is a pipe leading to the lower part of the boiler, and is the expansion-tube between these pipes a and b, and' at a level corresponding to the lowest water-level of the boiler, in vorder that the tube e may be expanded by steam taking the place of water in said tube when the water-level fallsbelow the desired point. These pipes and their action are well, known. I sustain one endet` the pipe c firmly by the nut and support d. The other vend is `free to move as the pipe expands longitudinally. Near the pipe c-and support d I attach one end. of my tension-valve opener e, and connect the other `end with the pipe c by means of the ring fand its `adjusting-nuts, so that the tension valve-opener will be drawn more nearly into a straight line by the expansion of the pipe c. This tension-valve opener is shown as two bars, jointed in -the middle and at their ends. It may, however, be made as a bar, rod, spring, or chain, and be attached atthe ends directly to the pipe, without being. adjustable, thc adjustment being at the valve itself. The steam-whistle g is made in any usual manner. his the pipe supplying steam to the same, and t' is the valve, and k the stem to the tension valve-,opener e. YThis stem 7c may be formed in any desired manner. I have,vhowever,'shown the same as a flattened ring at the part where the pipe c passes, so as to allow of the motion given to the stem and valve by 'the expansion'oil the tube c and the straightening of the openere giving a large-movement with a small extent of expansion. `The alarm may be of any desired character, but `a steam-whistle is preferred. The case enclosing the alarm is made with the bottom, Z, back m, top n, and ends o o, and p is a movable cover or door, to' give access to the parts, and q is a staple, to which a lock is to be applied, or a seal, or other reliable fastening, Y whereby the low-water detector, after having been inspected, can be secured from being injured, disconnected, or otherwise tampered with, either through ignorance, accident, or design. What claim, and desire to secure by Letters vIatent-,is- 21. 'lhertension-valve opener, in combination with an expansive tube, fitted and operating substantially as and 'for the purposes set forth. i y y I 2. The combination of an expansive tube with the tension-valve opener-Hind alarm-whistle, substantially as set forth. i l

Dated January 21, 1868.

W. W. BAILEY. .Witnesses Clins H. SIAIITII,

Gno. D. WALKER.. 

